Senior Mechanical Engineer

Work with Us. Change the World. At AECOM, we're delivering a better world. Whether improving your commute, keeping the lights on, providing access to clean water, or transforming skylines, our work helps people and communities thrive. We are the world's trusted infrastructure consulting firm, partnering with clients to solve the world’s most complex challenges and build legacies for future generations. There has never been a better time to be at AECOM. With accelerating infrastructure investment worldwide, our services are in great demand. We invite you to bring your bold ideas and big dreams and become part of a global team of over 50,000 planners, designers, engineers, scientists, digital innovators, program and construction managers and other professionals delivering projects that create a positive and tangible impact around the world. We're one global team driven by our common purpose to deliver a better world. Join us. AECOM  is seeking a motivated and skilled  Senior Mechanical Engineer  to support the design and construction of buildings within the  Buildings + Places (B+P)  business line. This opportunity can be based out of our  Markham, Mississauga, or Pickering offices , with opportunities for hybrid work available. This is a new role for the team. This is an exciting opportunity for a  Senior-level Mechanical Engineer  with extensive experience in building systems to serve as the  Technical Lead  and  Job Captain  for the Mechanical Discipline on  multi-discipline projects  for the  Defence  and  Transportation Market Sectors . The role also involves mentoring junior staff, contributing to technical excellence, and supporting project delivery across a wide range of building typologies. About AECOM Buildings + Places Canada (B+P Canada): B+P Canada is a vibrant and growing fully integrated team spanning architecture, all building engineering disciplines, landscape architecture, urban planning, urban design, economics, and asset management for design and infrastructure projects.   Major Responsibilities As a  Senior Mechanical Engineer , you will: Lead the  design of Plumbing, Fire Protection, and HVAC systems  for complex building projects. Serve as the  Technical Lead  for the Mechanical Discipline, providing specialized technical input and oversight on studies, designs, and construction documentation. Review and prepare  HVAC design concepts, layouts, and calculations , ensuring compliance with project requirements and industry standards. Develop  plumbing system layouts , including domestic water distribution, sanitary drainage, venting, storm drainage, and specialty systems such as oil grit interceptors and trench drains. Provide  fire suppression indicative design , including wet/dry sprinkler systems, standpipes, clean agent systems, and specialized suppression systems for unique applications (e.g., hangars). Oversee  Building Automation System (BAS) design  and ensure seamless integration with other building systems. Perform  quality control reviews  of design calculations, drawings, and technical specifications to ensure high-quality deliverables. Prepare and review  technical specification sections  and contribute to the development of engineering budgets and schedules. Collaborate with interdisciplinary teams to ensure seamless coordination across all building systems. Mentor and provide guidance to junior engineers and technicians, fostering a culture of continuous learning and technical excellence. Actively participate in  construction administration , including reviewing submittals, responding to RFIs, and conducting site visits to ensure project compliance with design intent. Support the  preparation of technical reports  and deliver results in a clear and concise manner to both technical and non-technical stakeholders. Key Technical Expertise The ideal candidate will have expertise in: •  HVAC Design and Construction Administration: Hydronic heating and cooling systems. Duct air distribution and terminal/central airside equipment selection. Net-zero heating and cooling solutions. General HVAC best practices. •  Plumbing Design and Construction Administration: Plumbing fixture selection and optimization of domestic water distribution. Sanitary and storm drainage systems. Specialty drainage systems (e.g., oil grit interceptors, trench drains). Domestic hot water production systems. •  Fire Suppression Design and Construction Administration: Wet and dry sprinkler systems. Standpipes and clean agent gas/aerosol systems. Specialized fire suppression systems for unique applications. •  Building Automation Systems (BAS): Design and integration of BAS for efficient building operations. Minimum Requirements: Bachelor’s Degree in Mechanical Engineering. Minimum  6 years of experience  in designing HVAC, plumbing, and fire protection systems for commercial, institutional, and light industrial facilities. Demonstrated equivalency of experience and/or education may be considered. Preferred Requirements: P rofessional Engineering (P.Eng.) license  is strongly preferred. PWGSC/PSPC - Level II Secret Clearance  preferred for Federal Projects. Proficiency in AutoCAD, MicroStation, and REVIT for 2D and 3D design and drafting. Experience with Carrier HAP, Trane Trace, or Design Builder Strong communication skills (spoken and written) with the ability to present technical concepts to diverse audiences. Experience with mechanical system installation, service and maintenance requirements. Experience mentoring junior staff and contributing to team development. Familiarity with sustainable design practices and net-zero building solutions. Relocation is not available for this position. Sponsorship for Canadian employment authorization is not available for this position. About AECOM   AECOM is proud to offer comprehensive benefits to meet the diverse needs of our employees. Depending on your employment status, AECOM benefits may include medical, dental, vision, life, AD&D, disability benefits, paid time off, leaves of absences, voluntary benefits, perks, flexible work options, well-being resources, employee assistance program, business travel insurance, service recognition awards, retirement savings plan, and employee stock purchase plan.  AECOM is the global infrastructure leader, committed to delivering a better world. As a trusted professional services firm powered by deep technical abilities, we solve our clients’ complex challenges in water, environment, energy, transportation and buildings. Our teams partner with public- and private-sector clients to create innovative, sustainable and resilient solutions throughout the project lifecycle – from advisory, planning, design and engineering to program and construction management. AECOM is a Fortune 500 firm that had revenue of $16.1 billion in fiscal year 2024. Learn more at aecom.com.  What makes AECOM a great place to work   You will be part of a global team that champions your growth and career ambitions. Work on groundbreaking projects - both in your local community and on a global scale - that are transforming our industry and shaping the future. With cutting-edge technology and a network of experts, you’ll have the resources to make a real impact. Our award-winning training and development programs are designed to expand your technical expertise and leadership skills, helping you build the career you’ve always envisioned. Here, you’ll find a welcoming workplace built on respect, collaboration and community - where you have the freedom to grow in a world of opportunity.  As an Equal Opportunity Employer, we believe in your potential and are here to help you achieve it. All your information will be kept confidential according to EEO guidelines. Artificial intelligence will be used to support the screening, assessment, and selection of applicants for this role. Final hiring decisions are made by the hiring team.